Genesis Block

The genesis block, also known as Block 0 or Block 1, is the very first block ever to be added to a certain blockchain network. A block makes reference to the preceding block when it is broadcast to the blockchain. There is no earlier block to refer to in the genesis block's case, though. The majority of the time, genesis blocks are hardcoded into the software because there is no previous block to refer to.

Address

In blockchain, an address refers to a unique alphanumeric identifier associated with a digital wallet or account that is used to send, receive, and store cryptocurrencies or other digital assets.
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Node

An essential component of a blockchain infrastructure, a node stores data and allows all communication (transactions) to pass through it.
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Coin

Cryptocurrencies known as coins run on separate blockchains and are unrelated to other coins. Such a cryptocurrency's single unit is also known as a coin.
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